A1201LLHLT-T Allegro Microsystems Inc, A1201LLHLT-T Datasheet

IC SW CONTINUOUS TIME BIPO SOT23

A1201LLHLT-T

Manufacturer Part Number
A1201LLHLT-T
Description
IC SW CONTINUOUS TIME BIPO SOT23
Manufacturer
Allegro Microsystems Inc
Type
Bipolar Latchr
Datasheet

Specifications of A1201LLHLT-T

Sensing Range
50G Trip, -50G Release
Voltage - Supply
3.8 V ~ 24 V
Current - Supply
7.5mA
Current - Output (max)
25mA
Output Type
Digital, Open Drain
Features
Regulated Voltage
Operating Temperature
-40°C ~ 150°C
Package / Case
SOT-23W
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
620-1007-2
Features and Benefits
▪ Continuous-time operation
▪ Stable operation over full operating temperature range
▪ Reverse battery protection
▪ Solid-state reliability
▪ Factory-programmed at end-of-line for optimum
▪ Robust EMC performance
▪ High ESD rating
▪ Regulator stability without a bypass capacitor
Packages: 3 pin SOT23W (suffix LH), and
3 pin SIP (suffix UA)
Not to scale
A1201-DS, Rev. 14
performance
▫ Fast power-on time
▫ Low noise
VCC
Regulator
Functional Block Diagram
Gain
Amp
Continuous-Time Bipolar Switch
To all subcircuits
Control
Trim
Description
The Allegro
generation replacement and extension of the popular Allegro
A3134 bipolar switch. Overall, the A1201, produced with
BiCMOS technology, is a continuous-time device that
features fast power-on time and low-noise operation. Device
programming is performed after packaging, to ensure increased
switchpoint accuracy by eliminating offsets that can be induced
by package stress. Unique Hall element geometries and low-
offset amplifiers help to minimize noise and to reduce the
residual offset voltage normally caused by device overmolding,
temperature excursions, and thermal stress.
The A1201 Hall-effect bipolar switch includes the following on
a single silicon chip: voltage regulator, Hall-voltage generator,
small-signal amplifier, Schmitt trigger, and NMOS output
transistor. The integrated voltage regulator permits operation
from 3.8 to 24 V. The extensive on-board protection circuitry
makes possible a ±30 V absolute maximum voltage rating for
superior protection in automotive and motor commutation
applications, without adding external components. The device
is a member of the A1201 product family which has identical
electrical characteristics throughout, but provides a range of
magnetic switchpoints.
Continued on the next page…
Offset
®
A1201 Hall-effect bipolar switch is a next-
GND
VOUT
A1201

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A1201LLHLT-T Summary of contents

Page 1

Features and Benefits ▪ Continuous-time operation ▫ Fast power-on time ▫ Low noise ▪ Stable operation over full operating temperature range ▪ Reverse battery protection ▪ Solid-state reliability ▪ Factory-programmed at end-of-line for optimum performance ▪ Robust EMC performance ▪ ...

Page 2

... Package SOT23W, a miniature low-profile surface-mount Selection Guide 1 Part Number Packing A1201ELHLT-T 2 7-in. reel, 3000 pieces/reel A1201EUA-T 2 Bulk, 500 pieces/bag A1201LLHLT-T 2 7-in. reel, 3000 pieces/reel A1201LUA-T 2 Bulk, 500 pieces/bag 1 Contact Allegro for additional packing options. 2 Variant is obsolete. Absolute Maximum Ratings Characteristic ...

Page 3

A1201 Package Terminal List Name VCC Connects power supply to chip VOUT Output from circuit GND Ground Continuous-Time Bipolar Switch Pin-out Diagrams 2 Description Package Number Package LH Package ...

Page 4

A1201 OPERATING CHARACTERISTICS over full operating voltage and ambient temperature ranges, unless otherwise noted Characteristic Symbol Electrical Characteristics 1 Supply Voltage V Output Leakage Current I OUTOFF Output On Voltage V OUT(SAT) Power-On Time 2 Output Rise Time 3 3 ...

Page 5

A1201 THERMAL CHARACTERISTICS may require derating at maximum conditions, see application information Characteristic Package Thermal Resistance Continuous-Time Bipolar Switch Symbol Package LH, 1-layer PCB with copper limited to solder pads Package LH, 2-layer PCB with 0.463 in. R θJA side ...

Page 6

A1201 Supply Current (On) versus Ambient Temperature (A1201) 8.0 7.0 6.0 5.0 4.0 3.0 2.0 1.0 0 – (°C) A Supply Current (Off) versus Ambient Temperature (A1201) 8.0 7.0 6.0 5.0 4.0 3.0 2.0 1.0 0 –50 ...

Page 7

A1201 Operate Point versus Ambient Temperature (A1201 -10 -20 -30 -40 - (°C) A Release Point versus Ambient Temperature (A1201 -10 -20 -30 -40 -50 -50 ...

Page 8

A1201 Bipolar Device Switching The A1201 provides highly sensitive switching for applica- tions using magnetic fields of alternating polarities, such as ring magnets. There are three switching modes for bipolar devices, referred to as latch, unipolar switch, and negative switch. ...

Page 9

A1201 the field is reduced beyond the B level, the device switches OP back to the low state. The typical output behavior of the A1201 device is latching. That is, switching to the low state when the magnetic field at ...

Page 10

A1201 The choice between continuous-time and chopper-stabilized designs is solely determined by the application. Battery manage- ment is an example where continuous-time is often required. In these applications chopped with a very small duty cycle CC in order ...

Page 11

A1201 Power Derating The device must be operated below the maximum junction temperature of the device Under certain combinations of J(max) peak conditions, reliable operation may require derating sup- plied power or improving the heat dissipation properties of ...

Page 12

A1201 +0.12 2.98 –0.08 3 +0.10 2.90 –0. 10° REF 0.95 BSC For Reference Only; not for tooling use (reference dwg. 802840) Dimensions in millimeters Dimensions exclusive of mold flash, gate burrs, and dambar protrusions Exact case and ...

Page 13

A1201 4.09 45° +0.08 3.02 –0.05 2.16 MAX 0.51 REF 1 2 15.75 ±0.51 +0.05 0.43 –0.07 Copyright ©2005-2009, Allegro MicroSystems, Inc.Allegro MicroSystems, Inc. reserves the right to make, from time to time, such de par tures from the detail ...

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